Valve seat grinder



Nov. 16, 1948.

W. A. KUHLMAN VALVE SEAT GRINDER Filed Dec. 26, 1946 INVENTOR.

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W? firr' Patented Nov. 16, 1948 U! FED .rS'TiATEEfS PATEN T DIFIFlC-E 2,454,068 VALVE SEAT GRINHER William A. Kuhlman, Los 'Angel'esfiCalif. Application December 26,1946, Serial No. 718,396

2 Claims. 1

My invention relates to improvements in valve seat grinders and has for its principal objects, to provide a simple, practical and inexpensive device which may be conveniently used for rapidly and accurately grinding the valve seats of faucets, further, to provide a valve seat grinder having a manually operable shaft carrying at one end a grinding element such as a small, solid body, composed of pulverized abrasive material such as emery, Carborundum or the like, having its lower end shaped so as to conform to the shape of the conventional valve seats of faucets, taps, spigots and the like and further, to mount on the shaft that carries the grinding member, a small sleeve which rests on the upper portion of the faucet or valve body, and provides a bearing for said shaft and thereby insuring accuracy of the valve seat grinding function.

A further object of my invention is to provide novel means for mounting a crank handle on the upper end of the grinder shaft.

With the foregoing and other objects in view, my invention consists in certain novel features of construction and arrangement of parts which will be hereinafter more fully described and claimed and illustrated in the accompanying drawings, in which:

Fig. 1 is a vertical section through the center of a faucet and showing my improved valve seat grinder in operative position thereon.

Fig. 2 is a detail section taken on the line 22 of Fig. l. 1

Fig. 3 is a detail section taken on the line 3-3 of Fig. 1.

Fig. 4 is a detail section similar to Fig, 3 and showing a modified form of mounting the grinding member on the shaft.

Referring by numerals to the accompanying drawing which illustrates a preferred embodiment of my invention, I designates a shaft of any suitable length and diameter and composed of wood, plastics, composition or metal.

Formed in the upper end of shaft in is an axial bore H and leading from the upper end of said bore to the outer face of said shaft is a, horizontally disposed notch l2.

Occupying bore H is the inner end member [3 of a small crank having the end portion of its intermediate arm Hi, adjacent member l3, seated in notch I2.

Member I3 and adjacent portion of arm M are rigidly secured to shaft ID by a suitable adhesive.

Mounted for rotation on the upstanding outer end member l5 of the crank, is a knob or small handle l6, of Wood, plastics or metal.

Carried by the lower end of shaft I0 is a substantially cylindrical body I! of abrasive substance such as pulverized emery, Carborundum or the like, same being moulded onto said shaft and to anchor said body to the shaft, the end of the latter may be provided with an inclined slot such as 18 which receives a portion of the body I! when same is molded onto the shaft.

The anchoring of the abrasive body to the shaft may be accomplished by forming a circumferential groove such as H! in the lower portion of the shaft.

To conform to the angularity of valve seats the underface of body I! adjacent the outer face of the body l! is beveled as designated by 2B,

To provide an adjustable bearing for shaft 10 while the grinder is in use, a collar 2 I, of rubber, or composition is mounted to slide and rotate freely upon said shaft and. said collar preferably tapers toward its lower end.

To use the grinder, the lower portion thereof is inserted in the valve housing, after the valve and its stem have been remove-d therefrom.

After the bevelled face 20 on the underside of member [1 has been positioned on the valve seat as seen in Fig. l, collar 2! is moved down on shaft l0 until the lower portion of said collar enters and rests upon the upper portion of the valve housing.

Actuation of the crank shaft rotates shaft l0 and the rubbing action of the lower end of member I"! on the valve seat quickly and accurately grinds and re-faces said seat.

During the grinding operation just described, collar 2| provides a firm and substantial bearing for shaft Ill, thus holding same in stable operative position and insuring perfect grinding of the valve seat.

The use of a hard body of pulverized abrasive material for re-facing valve seats eliminates chatter of the tool while in service, does not gouge or produce burrs on the seat and materially speeds up the grinding and re-surfacing operation.

Thus it will be seen that I have provided a valve seat grinding tool that is simple in structure, inexpensive of manufacture and very effective in performing the functions for which it is intended.

It will be understood that minor changes in the size, form and construction of the various parts of my improved valve seat grinder may be made and substituted for those herein shown and described, without departing from the spirit Of my invention, the scope of which is set forth in the appended claims.

I claim as my invention:

1. In a valve seat grinding tool a shaft provided in its lower end with a notch, an abrasive body enclosing the lower end of said shaft with a portion embedded in said notch to anchor said body to said shaft, the upper end of said shaft being provided with an axial bore and a radial notch at the upper end of said bore, and a crank having inner end portions seated in said bore and notch.

2. The valve grinding tool as set forth in claim 1, with an elastic bearing forming member loose- 1y mounted on said shaft.

WILLIAM A. KUHLMAN.

4 REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

